478 lines
13 KiB
JavaScript
478 lines
13 KiB
JavaScript
'use strict';
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var common = require('./common');
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var YAMLException = require('./exception');
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var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
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var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
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var _toString = Object.prototype.toString;
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var _hasOwnProperty = Object.prototype.hasOwnProperty;
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var CHAR_TAB = 0x09; /* Tab */
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var CHAR_LINE_FEED = 0x0A; /* LF */
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var CHAR_CARRIAGE_RETURN = 0x0D; /* CR */
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var CHAR_SPACE = 0x20; /* Space */
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var CHAR_EXCLAMATION = 0x21; /* ! */
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var CHAR_DOUBLE_QUOTE = 0x22; /* " */
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var CHAR_SHARP = 0x23; /* # */
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var CHAR_PERCENT = 0x25; /* % */
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var CHAR_AMPERSAND = 0x26; /* & */
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var CHAR_SINGLE_QUOTE = 0x27; /* ' */
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var CHAR_ASTERISK = 0x2A; /* * */
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var CHAR_COMMA = 0x2C; /* , */
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var CHAR_MINUS = 0x2D; /* - */
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var CHAR_COLON = 0x3A; /* : */
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var CHAR_GREATER_THAN = 0x3E; /* > */
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var CHAR_QUESTION = 0x3F; /* ? */
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var CHAR_COMMERCIAL_AT = 0x40; /* @ */
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var CHAR_LEFT_SQUARE_BRACKET = 0x5B; /* [ */
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var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
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var CHAR_GRAVE_ACCENT = 0x60; /* ` */
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var CHAR_LEFT_CURLY_BRACKET = 0x7B; /* { */
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var CHAR_VERTICAL_LINE = 0x7C; /* | */
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var CHAR_RIGHT_CURLY_BRACKET = 0x7D; /* } */
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var ESCAPE_SEQUENCES = {};
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ESCAPE_SEQUENCES[0x00] = '\\0';
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ESCAPE_SEQUENCES[0x07] = '\\a';
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ESCAPE_SEQUENCES[0x08] = '\\b';
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ESCAPE_SEQUENCES[0x09] = '\\t';
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ESCAPE_SEQUENCES[0x0A] = '\\n';
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ESCAPE_SEQUENCES[0x0B] = '\\v';
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ESCAPE_SEQUENCES[0x0C] = '\\f';
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ESCAPE_SEQUENCES[0x0D] = '\\r';
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ESCAPE_SEQUENCES[0x1B] = '\\e';
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ESCAPE_SEQUENCES[0x22] = '\\"';
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ESCAPE_SEQUENCES[0x5C] = '\\\\';
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ESCAPE_SEQUENCES[0x85] = '\\N';
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ESCAPE_SEQUENCES[0xA0] = '\\_';
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ESCAPE_SEQUENCES[0x2028] = '\\L';
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ESCAPE_SEQUENCES[0x2029] = '\\P';
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var DEPRECATED_BOOLEANS_SYNTAX = [
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'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
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'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
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];
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function compileStyleMap(schema, map) {
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var result, keys, index, length, tag, style, type;
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if (null === map) {
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return {};
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}
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result = {};
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keys = Object.keys(map);
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for (index = 0, length = keys.length; index < length; index += 1) {
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tag = keys[index];
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style = String(map[tag]);
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if ('!!' === tag.slice(0, 2)) {
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tag = 'tag:yaml.org,2002:' + tag.slice(2);
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}
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type = schema.compiledTypeMap[tag];
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if (type && _hasOwnProperty.call(type.styleAliases, style)) {
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style = type.styleAliases[style];
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}
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result[tag] = style;
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}
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return result;
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}
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function encodeHex(character) {
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var string, handle, length;
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string = character.toString(16).toUpperCase();
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if (character <= 0xFF) {
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handle = 'x';
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length = 2;
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} else if (character <= 0xFFFF) {
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handle = 'u';
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length = 4;
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} else if (character <= 0xFFFFFFFF) {
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handle = 'U';
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length = 8;
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} else {
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throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
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}
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return '\\' + handle + common.repeat('0', length - string.length) + string;
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}
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function State(options) {
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this.schema = options['schema'] || DEFAULT_FULL_SCHEMA;
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this.indent = Math.max(1, (options['indent'] || 2));
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this.skipInvalid = options['skipInvalid'] || false;
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this.flowLevel = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
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this.styleMap = compileStyleMap(this.schema, options['styles'] || null);
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this.implicitTypes = this.schema.compiledImplicit;
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this.explicitTypes = this.schema.compiledExplicit;
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this.tag = null;
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this.result = '';
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}
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function generateNextLine(state, level) {
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return '\n' + common.repeat(' ', state.indent * level);
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}
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function testImplicitResolving(state, str) {
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var index, length, type;
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for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
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type = state.implicitTypes[index];
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if (type.resolve(str)) {
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return true;
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}
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}
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return false;
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}
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function writeScalar(state, object) {
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var isQuoted, checkpoint, position, length, character, first;
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state.dump = '';
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isQuoted = false;
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checkpoint = 0;
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first = object.charCodeAt(0) || 0;
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if (-1 !== DEPRECATED_BOOLEANS_SYNTAX.indexOf(object)) {
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// Ensure compatibility with YAML 1.0/1.1 loaders.
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isQuoted = true;
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} else if (0 === object.length) {
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// Quote empty string
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isQuoted = true;
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} else if (CHAR_SPACE === first ||
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CHAR_SPACE === object.charCodeAt(object.length - 1)) {
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isQuoted = true;
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} else if (CHAR_MINUS === first ||
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CHAR_QUESTION === first) {
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// Don't check second symbol for simplicity
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isQuoted = true;
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}
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for (position = 0, length = object.length; position < length; position += 1) {
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character = object.charCodeAt(position);
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if (!isQuoted) {
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if (CHAR_TAB === character ||
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CHAR_LINE_FEED === character ||
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CHAR_CARRIAGE_RETURN === character ||
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CHAR_COMMA === character ||
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CHAR_LEFT_SQUARE_BRACKET === character ||
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CHAR_RIGHT_SQUARE_BRACKET === character ||
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CHAR_LEFT_CURLY_BRACKET === character ||
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CHAR_RIGHT_CURLY_BRACKET === character ||
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CHAR_SHARP === character ||
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CHAR_AMPERSAND === character ||
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CHAR_ASTERISK === character ||
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CHAR_EXCLAMATION === character ||
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CHAR_VERTICAL_LINE === character ||
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CHAR_GREATER_THAN === character ||
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CHAR_SINGLE_QUOTE === character ||
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CHAR_DOUBLE_QUOTE === character ||
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CHAR_PERCENT === character ||
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CHAR_COMMERCIAL_AT === character ||
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CHAR_COLON === character ||
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CHAR_GRAVE_ACCENT === character) {
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isQuoted = true;
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}
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}
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if (ESCAPE_SEQUENCES[character] ||
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!((0x00020 <= character && character <= 0x00007E) ||
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(0x00085 === character) ||
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(0x000A0 <= character && character <= 0x00D7FF) ||
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(0x0E000 <= character && character <= 0x00FFFD) ||
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(0x10000 <= character && character <= 0x10FFFF))) {
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state.dump += object.slice(checkpoint, position);
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state.dump += ESCAPE_SEQUENCES[character] || encodeHex(character);
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checkpoint = position + 1;
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isQuoted = true;
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}
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}
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if (checkpoint < position) {
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state.dump += object.slice(checkpoint, position);
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}
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if (!isQuoted && testImplicitResolving(state, state.dump)) {
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isQuoted = true;
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}
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if (isQuoted) {
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state.dump = '"' + state.dump + '"';
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}
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}
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function writeFlowSequence(state, level, object) {
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var _result = '',
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_tag = state.tag,
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index,
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length;
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for (index = 0, length = object.length; index < length; index += 1) {
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// Write only valid elements.
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if (writeNode(state, level, object[index], false, false)) {
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if (0 !== index) {
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_result += ', ';
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}
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_result += state.dump;
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}
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}
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state.tag = _tag;
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state.dump = '[' + _result + ']';
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}
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function writeBlockSequence(state, level, object, compact) {
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var _result = '',
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_tag = state.tag,
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index,
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length;
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for (index = 0, length = object.length; index < length; index += 1) {
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// Write only valid elements.
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if (writeNode(state, level + 1, object[index], true, true)) {
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if (!compact || 0 !== index) {
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_result += generateNextLine(state, level);
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}
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_result += '- ' + state.dump;
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}
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}
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state.tag = _tag;
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state.dump = _result || '[]'; // Empty sequence if no valid values.
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}
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function writeFlowMapping(state, level, object) {
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var _result = '',
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_tag = state.tag,
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objectKeyList = Object.keys(object),
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index,
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length,
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objectKey,
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objectValue,
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pairBuffer;
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for (index = 0, length = objectKeyList.length; index < length; index += 1) {
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pairBuffer = '';
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if (0 !== index) {
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pairBuffer += ', ';
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}
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objectKey = objectKeyList[index];
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objectValue = object[objectKey];
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if (!writeNode(state, level, objectKey, false, false)) {
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continue; // Skip this pair because of invalid key;
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}
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if (state.dump.length > 1024) {
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pairBuffer += '? ';
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}
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pairBuffer += state.dump + ': ';
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if (!writeNode(state, level, objectValue, false, false)) {
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continue; // Skip this pair because of invalid value.
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}
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pairBuffer += state.dump;
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// Both key and value are valid.
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_result += pairBuffer;
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}
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state.tag = _tag;
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state.dump = '{' + _result + '}';
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}
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function writeBlockMapping(state, level, object, compact) {
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var _result = '',
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_tag = state.tag,
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objectKeyList = Object.keys(object),
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index,
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length,
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objectKey,
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objectValue,
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explicitPair,
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pairBuffer;
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for (index = 0, length = objectKeyList.length; index < length; index += 1) {
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pairBuffer = '';
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if (!compact || 0 !== index) {
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pairBuffer += generateNextLine(state, level);
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}
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objectKey = objectKeyList[index];
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objectValue = object[objectKey];
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if (!writeNode(state, level + 1, objectKey, true, true)) {
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continue; // Skip this pair because of invalid key.
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}
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explicitPair = (null !== state.tag && '?' !== state.tag) ||
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(state.dump && state.dump.length > 1024);
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if (explicitPair) {
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if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
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pairBuffer += '?';
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} else {
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pairBuffer += '? ';
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}
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}
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pairBuffer += state.dump;
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if (explicitPair) {
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pairBuffer += generateNextLine(state, level);
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}
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if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
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continue; // Skip this pair because of invalid value.
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}
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if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
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pairBuffer += ':';
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} else {
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pairBuffer += ': ';
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}
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pairBuffer += state.dump;
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// Both key and value are valid.
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_result += pairBuffer;
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}
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state.tag = _tag;
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state.dump = _result || '{}'; // Empty mapping if no valid pairs.
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}
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function detectType(state, object, explicit) {
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var _result, typeList, index, length, type, style;
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typeList = explicit ? state.explicitTypes : state.implicitTypes;
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for (index = 0, length = typeList.length; index < length; index += 1) {
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type = typeList[index];
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if ((type.instanceOf || type.predicate) &&
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(!type.instanceOf || (('object' === typeof object) && (object instanceof type.instanceOf))) &&
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(!type.predicate || type.predicate(object))) {
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state.tag = explicit ? type.tag : '?';
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if (type.represent) {
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style = state.styleMap[type.tag] || type.defaultStyle;
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if ('[object Function]' === _toString.call(type.represent)) {
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_result = type.represent(object, style);
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} else if (_hasOwnProperty.call(type.represent, style)) {
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_result = type.represent[style](object, style);
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} else {
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throw new YAMLException('!<' + type.tag + '> tag resolver accepts not "' + style + '" style');
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}
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state.dump = _result;
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}
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return true;
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}
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}
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return false;
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}
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// Serializes `object` and writes it to global `result`.
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// Returns true on success, or false on invalid object.
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//
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function writeNode(state, level, object, block, compact) {
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state.tag = null;
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state.dump = object;
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if (!detectType(state, object, false)) {
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detectType(state, object, true);
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}
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var type = _toString.call(state.dump);
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if (block) {
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block = (0 > state.flowLevel || state.flowLevel > level);
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}
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if ((null !== state.tag && '?' !== state.tag) || (2 !== state.indent && level > 0)) {
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compact = false;
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}
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if ('[object Object]' === type) {
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if (block && (0 !== Object.keys(state.dump).length)) {
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writeBlockMapping(state, level, state.dump, compact);
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} else {
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writeFlowMapping(state, level, state.dump);
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}
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} else if ('[object Array]' === type) {
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if (block && (0 !== state.dump.length)) {
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writeBlockSequence(state, level, state.dump, compact);
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} else {
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writeFlowSequence(state, level, state.dump);
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}
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} else if ('[object String]' === type) {
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if ('?' !== state.tag) {
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writeScalar(state, state.dump);
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}
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} else if (state.skipInvalid) {
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return false;
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} else {
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throw new YAMLException('unacceptable kind of an object to dump ' + type);
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}
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if (null !== state.tag && '?' !== state.tag) {
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state.dump = '!<' + state.tag + '> ' + state.dump;
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}
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return true;
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}
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function dump(input, options) {
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options = options || {};
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var state = new State(options);
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if (writeNode(state, 0, input, true, true)) {
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return state.dump + '\n';
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} else {
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return '';
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}
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}
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function safeDump(input, options) {
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return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
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}
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module.exports.dump = dump;
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module.exports.safeDump = safeDump;
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